FIELD CROPS 287 



very frequent irrigation. In northwestern California, 

 and in western Oregon and Washington, it grows 

 very well and is very profitable. 



In the eastern United States and in Europe it is an in- 

 y^iluable crop in ^rotation^ with grain and root^ crops, and 

 is usually plowed under after the second year as a green- 

 manure crop, enriching the soils with nitrogen and humus. 

 Like alfalfa, it is fed both green and as hay; when^fed_green 

 to stock, it is apt to bloat them when much is eaten at once. 



In California red clover has been grown in the foothills 

 of the Sierra, with irrigation. In the valleys it is not often 

 grown, as it is apt to "burn" when hot, dry winds blow. 



Crimson clover, a beautiful kind with long red flower 

 spikes, is very highly valued in the East, but is not 

 adapted to California. It grows finely in western 

 Oregon and Washington, and yields heavy crops. 



The same is true of the white clover, which we grow 

 on our lawns with constant watering. In the East 

 and in the Northwest coast country it grows splendidly 

 and forms valuable pasture, but is not suitable for hay. 



There are no fewer than twenty-two kinds of clover native 

 to California and other dry regions of the Pacific slope, but 

 with few exceptions they are annuals, and as their foliage is 

 usually a little bitter, they are not much liked by stock. 

 There is one kind, called the wormskiold clover, however, 

 which looks very much like the common red clover and is 

 perennial. It grows in damp or even wet ground, and may 

 sometime become valuable in cultivation. 



The bur clover is well known all over California. It is 



